ext.search

Use bookextensionsearch-orig.bat  in the main root or any other folder you put it in the root of:
It will discover all files of these extension types & record their absolute path in text file, named by file ext.

pdf	Adobe Portable document format
epub	Open Publication structure e-book
azw3	Amazon Kindle eBook
mobi	Mobipocket eBook format
bdb2	Skillpipe course data
cbr	Comic Book Archive file or ComicBook Reader e-book
orb	Original eBook Reader e-book
opf	Open Packaging Format
htmlz	Zipped HTML document or e-book
pdg	Chinamaxx/SSreader digital book
mbp1	Kindle Touch annotation data
ibooks	iBooks e-book
wolf	WOLF document
iba	iBooks Author e-book
edt	Adobe Ebook download settings
azw6	Amazon Kindle eBook
lit	Microsoft Reader eBook
cbz	Comic Book Archive file or ComicBook Reader e-book
azw4	Amazon Kindle Print Replica e-book
fb2	FictionBook eBook
azw	Amazon Kindle eBook format
ebo	Microsoft Reader eBook Format
luci	Amazon Kindle Fire mobi ebook container
tr	TomeRaider eBook file
tpz	Amazon Kindle Topaz e-book
apnx	Amazon Kindle ebook index
cbt	CDisplay TAR Comic book file
txtz	eBook file
wbp	Webshots picture collection
umd	UMD mobile e-book
nat	Natata eBook file
fub	Franklin e-book format
epub	ebook backup file
mobi	ebook backup
mpub	Mobile optimized ePub ebook
ceb	Apabi e-book
ebk	eBook Pro e-book file
snb	Shanda Bambook eBook file
cl2arc	Comic Life 2 document archive
mart	Martview e-book data
cbc	Sony Portable Reader comic e-book
vbk	VitalSource Bookshelf VitalBook format eBook
azw1	Amazon Kindle Topaz e-book
bek	Shanda Bambook e-book
ibook	iBooks e-book data
ubk	Embiid e-book
gpf	Ganaxa’s Publishing e-book
mga	Manga comics document file
cebx	Apabi e-Book data
bfl	yBook e-book
pobi	Kindle store magazine e-book
cb7	CDisplay 7-Zip comic book
seb	Franklin eBookMan e-book
lbxoeb	Libronix DLS resource
tk3	TK3 multimedia eBook file
htxt	Hanvon WISEreader e-book file
lrx	BBeB ebook file
vellum	Vellum e-book project
xmdf	XMDF e-book
zno	Zinio reader magazine data
prc	Mobipocket eBook
csd	CSD Reader Compact Shared Document
txt7	e-Book
prc	Palm OS resource or e-book
comictpl Comic Life template
htz4	HyperMaker publication
txtc	e-Book
kf8	Amazon Kindle Format 8
imp	IMP e-book format
html0	Book Designer e-book file
ebk2	E-book format
sbrz	Sky Ebook Reader e-book
pdb	Palm OS database or e-book
tcr	TCR eBook file
tr3	TomeRaider eBook data
lrf	BBeB ebook
pmlz	e-Book
phl	Amazon Kindle popular highlights data
dnl	DNAML e-Book data
lbxcol	Libronix DLS resource collection data
meb	Open e-book data
pkg	Apple Newton e-book
webz	Web Format compressed eBook file
eba	EBA ebook format
oeb	Open eBook format
azn	Amazon Kindle newspaper data
rb	RocketEdition eBook file
cbcx	Comic Book Creator comic book save file format
ava	AvaaBook e-book
xeb	Apabi eBook format
qmk	YanCEyDesktop bookmark data
bkk	BookBuddi e-book
tpnueb	Payame Noor University e-book
lrt	e-Book data
aeh	Archos ebook file
ebaml	EBA ebook format
tr2	TomeRaider eBook
txtr	eBook
bpnueb	Payame Noor University (PNU) e-book
ybrar	yBook e-book
stk	STAReBOOK ebook file
ybhtm	yBook HTML file
dbk	DocBook source file
cbds	Comic Book DS file
ebx	Electronic Book exchange eBook file
kml	Hiebook eBook file
cba	CDisplay ACE Comic book file
cbmv	Comic Book Millennium collection file
brn	yBook compiled eBook
sgf	Sigil ebook file
ybk	YanCEyWare eBook file
chmprj	Abee CHM Maker HTML archive
pml	Palm Markup Language source code
cl2doc	Comic Life 2 document file
lrs	BBeB ebook source file
zna	Zinio Digital Publication annotation file
gpx	Ganaxa’s Publishing DRM protected ebook file
wmga	Web Manga comics document file
hsb	HandStory Suite eBook file
ybtxt	Ybook ebook file
ybrtf	Ybook ebook file
dfm	Help & Manual eBook template




.aeh
.apnx
.ava
.azn
.azw
.azw1
.azw3
.azw4
.azw6
.bdb2
.bek
.bfl
.bkk
.bpnueb
.brn
.cb7
.cba
.cbc
.cbcx
.cbds
.cbmv
.cbr
.cbt
.cbz
.ceb
.cebx
.chmprj
.cl2arc
.cl2doc
.comictpl
.csd
.dbk
.dfm
.dnl
.eba
.ebaml
.ebk
.ebk2
.ebo
.ebx
.edt
.epub
.epub
.fb2
.fub
.gpf
.gpx
.hsb
.html0
.htmlz
.htxt
.htz4
.iba
.ibook
.ibooks
.imp
.kf8
.kml
.lbxcol
.lbxoeb
.lit
.lrf
.lrs
.lrt
.lrx
.luci
.mart
.mbp1
.meb
.mga
.mobi
.mobi
.mpub
.nat
.oeb
.opf
.orb
.pdb
.pdf
.pdg
.phl
.pkg
.pml
.pmlz
.pobi
.prc
.prc
.qmk
.rb
.sbrz
.seb
.sgf
.snb
.stk
.tcr
.tk3
.tpnueb
.tpz
.tr
.tr2
.tr3
.txt7
.txtc
.txtr
.txtz
.ubk
.umd
.vbk
.vellum
.wbp
.webz
.wmga
.wolf
.xeb
.xmdf
.ybhtm
.ybk
.ybrar
.ybrtf
.ybtxt
.zna
.zno